<template>
  <div style="height: 100vh; display: flex; justify-content: center;background-color: #0f9876">
    <div style="display: flex; background-color: white; margin-top: 20vh; margin-bottom: 20vh; width: 50%; border-radius: 5px; overflow: hidden;">
      <div style="flex: 1;">
        <img src="../assets/login.png" alt="" style="width: 100%">
      </div>
      <div style="flex: 1; display: flex; align-items: center ;justify-content: center;" >
        <el-form :model="user" style="width: 80%"  :rules="rules" ref="loginRef">
          <div style="font-size: 20px; font-weight: bold; text-align: center; margin-bottom: 40px">欢迎登陆后台管理系统</div>
          <el-form-item prop="username">
            <el-input prefix-icon="el-icon-user" size="medium" placeholder="请输入账号" v-model="user.username"></el-input>
          </el-form-item>
          <el-form-item prop="password">
            <el-input prefix-icon="el-icon-lock" size="medium" show-password placeholder="请输入密码" v-model="user.password"></el-input>
          </el-form-item>
          <el-form-item prop="code">
            <div style="display: flex">
              <el-input placeholder="请输入验证码" prefix-icon="el-icon-circle-check" size="medium" style="flex: 1" v-model="user.code"></el-input>
              <div style="flex: 1;height: 36px">
                <valid-code @update:value="getCode" />
              </div>
            </div>
          </el-form-item>
          <el-form-item>
            <el-button type="primary" style="width: 100%" @click="login">登 陆</el-button>
          </el-form-item>
          <div>
            <div style="flex: 1">还没有账号？请<span style="color: #0f9876;cursor: pointer" @click="$router.push('/register')">注册</span></div>
            <div style="flex: 1;text-align: right"><span style="color: #0f9876; cursor: pointer" @click="handleForgetPass">忘记密码</span></div>
          </div>

        </el-form>
      </div>
    </div>


    <el-dialog title="忘记密码" :visible.sync="forgetPassDialogVis" width="30%">
      <el-form :model="forgetUserForm" label-width="80px" style="padding-right: 20px">
        <el-form-item label="用户名">
          <el-input v-model="forgetUserForm.username" autocomplete="off" placeholder="请输入用户名"></el-input>
        </el-form-item>
        <el-form-item label="手机号">
          <el-input v-model="forgetUserForm.phone" autocomplete="off" placeholder="请输入手机号"></el-input>
        </el-form-item>
      </el-form>
      <div slot="footer" class="dialog-footer">
        <el-button @click="forgetPassDialogVis = false">取 消</el-button>
        <el-button type="primary" @click="resetPassword">确 定</el-button>
      </div>
    </el-dialog>

  </div>
</template>

<script>
import ValidCode from "@/components/ValidCode.vue"
import axios from "axios";

export default {
  name: "Login",
  components: {
    ValidCode
  },
  data() {
    const validateCode = (rule, value, callback) => {
      if (value === '') {
        callback(new Error('请输入验证码'));
      } else if (value.toLowerCase()!== this.code) {
        callback(new Error('验证码错误'));
      } else {
        callback();
      }
    };

    return {
      forgetUserForm: {},   // 忘记密码的表单数据
      forgetPassDialogVis: false,
      code: '',  // 验证码组件传递过来的code
      user: {
        code: '',   // 表单里用户输入的code 验证码
        username: '',
        password: '',
      },
      rules: {
        username: [
          { required: true, message: '请输入账号', trigger: 'blur' },
        ],
        password: [
          { required: true, message: '请输入密码', trigger: 'blur' },
        ],
        code: [
          { validator: validateCode, trigger: 'blur' }
        ],
      }
    };
  },
  methods: {
    handleForgetPass() {   //  初始化表单的数据
      this.forgetUserForm = {};
      this.forgetPassDialogVis = true;
    },
    resetPassword() {
      // 模拟重置密码成功
      this.$message.success('重置成功');
      this.forgetPassDialogVis = false;
    },
    getCode(code) {
      this.code = code.toLowerCase();
    },
    login() {
      axios.post('http://localhost:9090/login', {
        username: this.user.username,
        password: this.user.password
      }, {
        headers: {
          'Content-Type': 'application/json'
        }
      })
          .then(response => {
            if (response.data && response.data.code === '200' && response.data.msg === '操作成功') {
              this.$message.success('登录成功！');
              this.$router.push('/home');
            } else {
              if (typeof response.data === 'object' && response.data.error) {
                this.$message.error(`后端返回错误信息：${response.data.error}`);
              } else {
                this.$message.error(`未知后端响应：${response.data}`);
              }
            }
          })
          .catch(error => {
            if (error.response && error.response.data && error.response.data.error) {
              this.$message.error(`后端返回错误信息：${error.response.data.error}`);
            } else {
              this.$message.error('登录时发生网络错误或未知错误，请稍后重试。');
            }
          });
    }
  }
};
</script>

<style scoped>

</style>